User Instance
GET /api/users/279/?format=api
{
"username": "Nemael",
"gravatar": "//www.gravatar.com/avatar/fc0306a93cf6787f25c055e6bec2a979?d=wavatar",
"has_key": false
}GET /api/users/279/?format=api
{
"username": "Nemael",
"gravatar": "//www.gravatar.com/avatar/fc0306a93cf6787f25c055e6bec2a979?d=wavatar",
"has_key": false
}